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WO2009080589A2 - Solution d'interface de communication - Google Patents

Solution d'interface de communication Download PDF

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Publication number
WO2009080589A2
WO2009080589A2 PCT/EP2008/067551 EP2008067551W WO2009080589A2 WO 2009080589 A2 WO2009080589 A2 WO 2009080589A2 EP 2008067551 W EP2008067551 W EP 2008067551W WO 2009080589 A2 WO2009080589 A2 WO 2009080589A2
Authority
WO
WIPO (PCT)
Prior art keywords
protocol
node
btf
network
database
Prior art date
Application number
PCT/EP2008/067551
Other languages
English (en)
Other versions
WO2009080589A3 (fr
Inventor
Dirk Kopplin
Christian HERRERO VERÓN
Hans Bertil RÖNNEKE
Gunnar Rydnell
Stefan Karl Toth
Original Assignee
Telefonaktiebolaget L M Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget L M Ericsson (Publ) filed Critical Telefonaktiebolaget L M Ericsson (Publ)
Priority to AT08864524T priority Critical patent/ATE547886T1/de
Priority to EP08864524A priority patent/EP2245903B1/fr
Priority to US12/809,647 priority patent/US20100272021A1/en
Publication of WO2009080589A2 publication Critical patent/WO2009080589A2/fr
Publication of WO2009080589A3 publication Critical patent/WO2009080589A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/045—Interfaces between hierarchically different network devices between access point and backbone network device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks

Definitions

  • the present invention relates to a solution for handling communication protocol messages in a mixed protocol standard network
  • EPS Evolved Packet Services
  • 3G EPS 3G EPS
  • SAE/LTE 3GPP EPS
  • Evolved packet services are provided to mobile users in the evolved packet core (EPC)
  • EPC evolved packet core
  • the access technologies available for an UE to get service from the network, voice service operator, specific services (e g IMS) or general internet access are 2G/3G or LTE in the 3GPP technologies
  • the architecture allows for the UE to get access and stay connected via a UP GW, i e the PDN-GW
  • the MME which assigns the UE to a PDN-GW for User Plane access
  • the PDN-GW assigns an IP address to the UE
  • the Session Management i e bearers and handling of bearers, is different in LTE access and 2G/3G access In 2G/3G PDP Contexts are used,
  • Non-Access Stratum (NAS) mapping needed in the UE or in the SGSN compatibility problems if mapping is not 100% 1 -to- 1 - legacy NAS (PDP Cxt) provides less functionality than LTE NAS (probably)
  • QoS Quality of Service
  • 3GPP REL-8 evolved packet system (EPS) EPS is designed for leverage of services from different provides and over different access types to mobile terminals
  • EPS evolved packet system
  • a communication node handling inter protocol issues in the mixed protocol telecommunications network comprising - a processing unit
  • the processor unit is arranged to execute instruction sets stored in the memory unit to perform database lookup operations between two different communication protocol standards communicated on the communication interface and further arranged to operate a bearer translation function, i e BTF, providing the database lookup between the two different protocol standards
  • the BTF is arranged to communicate with a database, externally or internally located, with a protocol lookup table providing connectivity between protocol messages in the two different protocol standards
  • the node may be one of a Serving GPRS Support Node, i e SGSN, base station, or a standalone node
  • the mixed protocol network may for instance comprise a combined GPRS and EPS based network
  • the BTF may be arranged to handle terminal, RANAP, and Base Station System GPRS Protocol issues into Evolved Packet System specific signalling and the BTF may further be arranged to map signalling parameters between the communication 5 protocols and the BTF may further be arranged to hide parameter differences between the communication protocols For instance the BTF may be arranged to map parameters between Packet Data Protocol context and Evolved Packet System bearer domains
  • a second aspect of the present invention is provided, an infrastructure network supporting 0 wireless communication with user equipment, comprising at least one node according to the first aspect
  • a third aspect of the present invention is provided, a method in a telecommunications network handling inter protocol issues in a mixed communication protocol network 5 configuration using a bearer translation function, i e BTF handling connectivity between different communication protocols and wherein the BTF is arranged to communicate with a database with a protocol lookup table for each protocol in the mixed protocol network, comprising steps of in a node receiving a control message in a first protocol standard format, 0 sending a request to a database to find a suitable conversion message in a second protocol standard format, receiving a response from the database with a suitable conversion message, converting the control message in the first protocol standard format to the second protocol standard format, 5 transmitting the converted control message
  • processor program stored in a processor readable storage medium, comprising instruction sets for operating the steps of the method 0
  • a system handling inter protocol issues in a mixed communication protocol network, comprising
  • a database comprising a lookup table connecting different communication 5 protocols, wherein the node is arranged to convert control messages in one protocol standard format to another standard format using the database
  • Fig 1 illustrates schematically an embodiment of a network system according to the present invention
  • Fig 2A and B illustrates schematically nodes according to the present invention
  • Fig 3 illustrates schematically in a block diagram a method according to the present invention
  • Fig 4 illustrates schematically a NAS, same SM in 2G/3G and LTE according to the present invention
  • Fig 5 illustrates schematically how SGSN connects PDP context domain to EPS bearer domain according to the present invention
  • Fig 6 illustrates schematically in a sequence diagram call flow for domain translation according to the present invention
  • Fig 7 illustrates schematically in a sequence diagram call flow for secondary PDP context request with bearer translation function enabled according to the present invention
  • reference numeral 10 generally indicate a network according to the present invention, comprising at least one base station 1 or similar wireless access gateway (e g access point) to an infrastructure communication network 2
  • the base station 1 is arranged to communicate with user equipment 3 (UE) wirelessly
  • the base station 2 also comprises an antenna 20
  • the core infrastructure communication network 2 comprises several different entities depending on communication protocol used which will be discussed in more detail later in this document
  • a node device 1 (e g a base station in a RAN (Radio Access Network) implementing the solution according to the present invention is shown
  • the device may comprise at least one processing unit 201 , at least one memory unit 202, and at least one communication interface 203 Furthermore, the device comprises a transceiver portion 208 for receiving and transmitting radio signals
  • the transceiver portion may comprise AD/DA un ⁇ t(s) 204, at least one power amplifier 205, 206, 207, and optionally a switch/multiplexer 209
  • the processing unit is arranged to run code for communication control and data traffic It may further be arranged to determine which antennas to use in a MIMO communication configuration
  • the processing unit 201 may comprise for instance a microprocessor, a Digital Signal Processor (DSP), an ASIC (application Specific Integrated Circuit), or an FPGA (Field programmable gate array) or a combination of these
  • the memory unit 202 may comprise any suitable type of memory (volatile and/or non-volatile
  • transceiver portion 208 may be configured in different ways depending on radio technology and/or communication protocol used as understood by the skilled person
  • Fig 2B shows a second embodiment of a communication network 220 according to the present invention comprising an infrastructure node 210 part of a core infrastructure network implementing the solution according to the present invention
  • the node 210 may comprise a processing unit 211 controlling communication data (control and/or user plane communication data)
  • the node 210 further comprise at least one memory unit (volatile and/or non-volatile) 212 as understood by the skilled person and at least one communication interface 213, 214
  • the communication interface may comprise one access interface 213 to an access network 215 ( ⁇ e downstream towards the UE 3) and one infrastructure network interface 214 ( ⁇ e upstream away from the UE) towards an infrastructure network 216 (e g the Internet or other communication networks)
  • a server 217 may be attached to the infrastructure network
  • the access network interface and infrastructure network interface may be using the same physical communication interface (e g Ethernet, ATM, or similar communication interface)
  • the infrastructure node may comprise a Serving GPRS Support Node (SGSN), a Gateway GPRS
  • the present invention is a solution for handling communication between mixed protocol telecommunication networks
  • the solution may be implemented in different ways and is applicable on a general basis for 2G/3G networks, e g GPRS networks
  • the basic idea of a first method according to the present invention is to construct a new NAS (Non-Access Stratum) protocol over the air between the UE and the core network, such that the same Session management (SM) is usable for both LTE and for 2G/3G access
  • the NAS protocol invokes the appropriate radio and mobility management (RM and MM) according to 2G/3G or LTE access, but uses the same SM ( ⁇ e bearers and QoS) in release (rel) 8 NAS SM messages will handle EPS bearers always, but include the appropriate RM/MM (radio and mobility management) information such as RAU (Routing Area Update (used for 2G/3G)) and TAU (Tracking Area Update (used for EUTRAN, LTE)) etc
  • a UE 500 is provided with functionality for handling the mixed protocol situation
  • the UE is provided with a radio management 702 (RM) functionality for handling both 2G/3G 503 and LTE 508 based radio communication protocols interfaces, each with respective session management
  • New NAS (x4 008 505), e g in rel 8 o May be used in both LTE and in 2G/3G, e g in ReI 8 o includes one SM (EPS Bearers) and two RM/MM (RAU and TAU)
  • a rel 7 UE uses 3GPP TS 24 008 and o PDP cxt (context) may be used all the way up to the GGSN rel7 or to the GGSN rel 7 equivalent functionality in the P-GW without involving the S-
  • GW o or the SGSN may translate from rel 7 PDP Cxt to rel 8 EPS Bearers and invoke the S-GW
  • the 3GPP TS 24 008 specifies the procedures used at the radio interface core network protocols within the 3rd generation mobile telecommunications system and the digital cellular telecommunications system It specifies the procedures used at the radio interface (Reference Point Um or Uu, see 3GPP TS 24 002 or 3GPP TS 23 002) for Call Control (CC), Mobility Management (MM), and Session Management (SM) These procedures are defined in terms of messages exchanged over the control channels of the radio interface The control channels are described in 3GPP TS 44 003 and 3GPP TS 25 301 The structured functions and procedures of this protocol and the relationship with other layers and entities are described in general terms in 3GPP TS 24 007
  • 3GPP TS 24 010 contains functional procedures for support of supplementary services
  • 3GPP TS 24 011 contains functional procedures for support of point-to-point short message services
  • 3GPP TS 24 012 contains functional description of short message - cell broadcast
  • 3GPP TS 44 060 contains procedures for radio link control and medium access control
  • 3GPP TS 44 003 and 3GPP TS 25 301 They use the functions and services provided by lower layers defined in 3GPP TS 44 005 and 3GPP TS 44 006 or 3GPP TS 25 331 [23c], 3GPP TS 25 322 and 3GPP TS 25 321 3GPP TS 24 007 gives the general description of layer 3 (A/Gb mode) and Non Access Stratum (Iu mode) including procedures, messages format and error handling
  • the dual mode UE that attaches in LTE will invoke EPS Bearers When the UE moves over to 2G/3G it will keep the EPS bearers
  • the dual mode UE that attaches in 2G/3G may invoke PDP Context as usual in GPRS, but when it moves over to LTE the bearers will be mapped to EPS bearers When the UE moves over to 2G/3G it will keep the EPS bearers
  • the single mode 2G/3G UE will always use PDP Contexts When moving to rel 7/8 NW mapping to PDP Contexts will be done Different states and situations in a bearer state machine for this first solution according to the present invention may be listed as follows
  • a second embodiment of the method according to the present invention provides a solution to connect 3GPP radio networks and terminals to an evolved packet core network
  • the basis of the present invention is to define a function in a core network node, such as the SGSN, translating GPRS signalling and parameters into EPS signalling and parameters
  • a core network node such as the SGSN
  • the Bearer Translation Function acts as a gateway translating terminal, RANAP, and Base Station System GPRS Protocol (BSSGP) signalling into EPS specific signalling
  • BTF Base Station System GPRS Protocol
  • the BTF is preferably placed in the SGSN, thus as close as possible to the RAN, but may also be deployed as a stand alone node somewhere between the SGSN and S-GW
  • the Bearer Translation Function allows the SGSN to hide differences in EPS Bearer/PDP context signalling from other nodes This would allow deploying EPS networks without bringing legacy functionality into Serving GW and PDN GW Serving GW and PDN GW are the
  • Fig 5 The principles of the function are outlined in Fig 5 using a system 900 according to the present invention
  • a system 900 To describe the method according to the present invention two domains are defined One is the PDP Context domain 910 and the other one is the EPS bearer domain 91 1
  • the UE 3 is located in the PDP context domain together with a BSS/RNC 901 in contact with an SGSN 902 via an appropriate interface 907
  • the SGSN 902 may be exemplified as the border between the two domains when the BTF is located in the SGSN
  • On the EPS bearer domain is located a Serving GW 903 in communication with the SGSN via an appropriate interface 908
  • the SGSN is in communication with an HLR 904 providing QoS settings to the SGSN via an appropriate interface 909
  • the PDP Context domain is compliant to GPRS 1 thus PDP Context type of signalling
  • the EPS bearer domain is compliant to EPS bearer signalling (3GPP Rel-8)
  • the Bearer Translation Function converts parameters and signalling from one domain to the other domain Specifics in one domain are not visible in the other domain
  • Bearer Translation Function hides all those indifferences from the outside
  • BTF Bearer Translation Function
  • a database is provided in communication with the BTF, which • Keeps data records of PDP context parameter
  • the BTF may be located at different locations in the network depending on the configuration of the network, such as in the SGSN or in a separate node located close to the SGSN
  • the BTF may be implemented as a software function
  • the database holds a translation table between different protocol standards which may be used as a lookup table for fast and accurate response to translational operations
  • the database may be located close to the BTF, in a separate node in the network, or even at a location in an external network
  • FIG. 1 One embodiment for an EPS/PDP mixed network of a BTF method according to the present invention may be shown in relation to Fig 3 and Fig 6
  • the functions involved in this procedure are PDP Context 1001 , BTF 1002, EPS Bearer 1003, and translation database 1004
  • the steps of the method are as follows, however it should be understood that not all are essential steps but this is only an example of handling a PDP context signalling procedure
  • PDP context signalling 1005 is sent to the BTF 1002
  • BTF translates 1010 the PDP context parameters into EPS bearer parameters Parameters having its equivalent in the corresponding domain, are mapped by the BTF without DB interaction BTF creates the EPS bearer signalling 101 1
  • BTF receives an EPS bearer signalling 1012 from the EPS Bearer
  • BTF sends a request 1014 to the DB to update the record 1015 with EPS bearer relation data and request needed PDP context related data 307
  • the DB acknowledges 1016 the update and sends the PDP context related data to the BTF
  • BTF translates 1017 the EPS bearer parameters into PDP context parameters and finalize the PDP Context signalling 1018 Parameters, having its equivalent in the corresponding domain, are mapped by the BTF without DB interaction
  • Fig 7 gives an example of a Secondary PDP Context Request procedure towards an EPS bearer domain as earlier discussed in relation to Fig 5
  • the devices of this embodiment are a UE 1 101 , a RAN 1102, an SGSN 1103, and a Serving GW 1104 (S-GW),
  • the BTF is placed in the SGSN 1103 connecting the PDP Context domain with the EPS Bearer domain
  • the UE sends an Activate Secondary PDP Context Request 1105 to the SGSN which performs a translation to the EPS domain using the BTF 1106
  • the SGSN sends a Request for dedicated bearer activation 1107 with parameters such as QCI, GBR, MBR, and TFT to the S-GW which responds with a Create dedicated bearer request 1108 with parameters such as QCI 1 GBR, MBR, and ARP
  • the BTF performs translation 1109 back to PDP Context domain and the SGSN sends a RAB/PFC Request 11 10 to the RAN 1102 with parameters such
  • the proposed method addresses GPRS networks when evolving into an Evolved Packet Core (EPC) network architecture
  • EPC Evolved Packet Core
  • New EPC nodes such as Serving GW and PDN GW don't need awareness of legacy PDP Context signaling e g QoS, call flow procedures, etc It is also applicable to legacy GPRS network Legacy awareness is hidden by the Bearer translation function from the adjacent domain
  • the Bearer Translation Function limits awareness into one single function If as in the given example the functionality is placed in the SGSN, the SGSN becomes the single point of control between the domains
  • the proposed method operators may deploy an EPC only network and still serve legacy terminals and RAN's
  • the functionality may simply be achieved by a software update of the SGSN
  • the methods of the present invention may be implemented as software code instruction sets stored in a computer readable storage medium and possible distributed to the nodes in the network using several different distribution methods, such as using the network for transporting code, using storage media such as CD, DVD, floppy disk
  • the UE 3 may have an implementation of the present invention in the form of software instruction sets stored in a computer/processor readable storage medium, such as a memory
  • the solution according to the present invention allows for - Simpler implementation, no NAS mapping needed in the UE or in the SGSN when moving between LTE and 2G/3G
  • mapping between PDP cxt and EPS bearer handling is not 100% 1-to-1 - Common QoS for both 2G/3G and LTE would also result in benefits in terms of reducing complexity in both terminal and network implementations
  • 3GPP TS 23.060 General Packet Radio Service (GPRS)
  • 3GPP TS 23.401 GPRS enhancements for E-UTRAN access
  • 3GPP TS 23.402 Architecture Enhancements for non-3GPP accesses
  • 3GPP TS 24.008 Mobile radio interface Layer 3 specification

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)

Abstract

La présente invention porte sur une solution pour gérer des problèmes de traduction de protocole dans un réseau à protocoles de communication mixtes (220). La solution peut être mise en oevre sous la forme d'un noed (210), d'un réseau, d'un système et d'un code de programme d'ordinateur. La solution met en jeu une fonction de traduction entre une fonctionnalité EPS et GPRS et une partie de la solution utilise une base de données contenant une table de consultation pour une réponse mise à jour et rapide à des opérations de traduction.
PCT/EP2008/067551 2007-12-19 2008-12-15 Solution d'interface de communication WO2009080589A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT08864524T ATE547886T1 (de) 2007-12-19 2008-12-15 Verfahren, vorrichtungen und programm zum abwickeln der protokollübersetzung zwischen eps und gprs
EP08864524A EP2245903B1 (fr) 2007-12-19 2008-12-15 Solution d'interface de communication
US12/809,647 US20100272021A1 (en) 2007-12-19 2008-12-19 Method, apparatuses and program for handling protocol translation between eps and gprs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1481907P 2007-12-19 2007-12-19
US61/014,819 2007-12-19

Publications (2)

Publication Number Publication Date
WO2009080589A2 true WO2009080589A2 (fr) 2009-07-02
WO2009080589A3 WO2009080589A3 (fr) 2009-12-03

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PCT/EP2008/067551 WO2009080589A2 (fr) 2007-12-19 2008-12-15 Solution d'interface de communication

Country Status (4)

Country Link
US (1) US20100272021A1 (fr)
EP (1) EP2245903B1 (fr)
AT (1) ATE547886T1 (fr)
WO (1) WO2009080589A2 (fr)

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CN112262613A (zh) * 2018-06-15 2021-01-22 瑞典爱立信有限公司 用于在基于服务的电信系统中操作网络网关服务的方法和设备

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CN104480236A (zh) * 2014-12-17 2015-04-01 广东菲安妮皮具股份有限公司 一种皮革加脂剂及其制备方法
CN112262613A (zh) * 2018-06-15 2021-01-22 瑞典爱立信有限公司 用于在基于服务的电信系统中操作网络网关服务的方法和设备
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CN112262613B (zh) * 2018-06-15 2024-05-28 瑞典爱立信有限公司 用于在基于服务的电信系统中操作网络网关服务的方法和设备

Also Published As

Publication number Publication date
EP2245903B1 (fr) 2012-02-29
ATE547886T1 (de) 2012-03-15
WO2009080589A3 (fr) 2009-12-03
EP2245903A2 (fr) 2010-11-03
US20100272021A1 (en) 2010-10-28

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